Two-wheel car truck



5 Sheets-Sheet 1 Feb'. 13, 1940. I J. A. CAMERON 4 TWO-WHEEL CAR TRUCK Filed F'eb. .11, 1935 BY 7M Feb. 13, 1940. J- CAMERON TWO-WHEEL CAR TRUCK Filed Feb. ll, 1935 5 Sheets-Sheet 2 Jin/anim" -JbsefH/Zamemn E www if.

Feb. 13, 1940. J. A. CAMERON TWOWHE`EL CAR TRUCK Filed Feb. ll, 1935 3 Sheets-Sheet 3 .III .T

w ww ww wm y 1N Q NN NN N EN@ www Nwvw Patented Feb. 1940 oFFicE Two-WHEELCAB, TRUCK Joseph Ashmore Cameron, Montreal, Quebec,

Canad Application February 11, `1935, Serial No. 6,057

6 Claims.

This invention relates to improvements in two Wheel car trucks, and the general objects of the invention are to provide a very light and simple `form of truck so constructed and arranged as to Further objects of the invention are generally to improve and simplify the construction of a truck of this character the better to adapt it to perform the functions required of it.

In this construction the invention includes a T-shaped longitudinally extending member orbolster having supporting members at one end for the car axle, having a draft attachment at the Opposite end of special form with means to pro- Vde increased resistance for bufling or pulling shocks; all as hereinafter more fully set forth and described in the accompanying specifications Figure 3 is a View partiallyin section and pari tially inl elevation taken along the lines 3.--3 of Figure 1.

Figure 4` is a sectional elevation showing a detail on the line l--t of Figure 3.

Figure 5 is a sectional elevation of an alternae tive form of the invention showing the arrangement of parts under a pulling shock.

Figure 6 is the same view as Figure 5 of the parts resisting a buiiing shock.

Figure 7 is a fragmentary sectional view showing, in elevation, the connecting lever between the two parts of the shock-resisting mechanism.

In the drawings like characters of reference indicate corresponding parts in all the figures.

Referring to the drawings, A indicates a cen-v portion l designedto t a dependent guideway C on the bolster A and vertically movable therein. The car axle housing is designed to receive the axle D on rwhich the wheels E are mounted,l

preferably with freedom of independent rotationV which may be accomplished through any cofnvenient form of roller vbearing F. The ends of "the car axle housing are flanged` at ll, and bear against washers l2, which in turn bear agains the hubs of the wheels.

Suitable spring means extend between the car axle housing and the bolster, these means abutting` the underside of the transverse extensions t3 and lliof the bolster A which forms the head of the T. l prefer to employ both coil springs. l and elliptical springs I6, but either one of these might be employed alone. Coil springs are conveniently seated on extension lugs Il' formedon theside of the car axle housing.

The inside end of the car truck is provided with convenient draft means such as a connecting rod G- which has an articulated or swiveling connection with the bolster and which `connects the same either to thebolster of the forward truck or to the coupling element on the rear' bolster of the car. y I

` The outside end of the bolster A is provided with a housing H designed to receive the shock absorbing means of a standard swivelledbutt coupler I. The construction of this coupler itself does not form a part of the present invention.

It is usual to` provide cushioning means for the shank of the coupler. elements which may be in the form of flat plates separated by rubber sections, or steel springs, or friction draft gear.

`In the design shown a draft rod 2B is provided connected to the coupling element and extend- `ing through-two sections 2 l' and 22, each of which sectionscomprises a plurality of parallel metal y plates` 23 separated by rubber rings 24 held to-` gether byend follower plates 25, 26, 2l and 28,

which are mounted in the cylindrical section 29l 25 being limited in its outward movement by a lug cr flan-ge 363. The rod 2li is provided with a central nut 3l adapted normally to fit betweenand` abut the plates 2.6 and 2l, being free to pass through an aperture 5t in a central abutment plate or lug 5l, which abutment plate is adapted to engage the plates 26 and 2l. The end plate 2li is adapted to have its movement limited by an end abutment plate or lug 't having an aperture 5ft' through which the cap nut 32 may pass. AIt `will be seen that under pulling strain the rubber rings will be compressed by reason of the movementof the plates 23 and 28 with draft rod k2i) against the` plates A and2'i, the latter being hel by the abutments 3i) and 5l To provide additional cushion resistance to a buiiing shock a separate cushioning element 33 is provided mounted in an extension 34 on the under side of the casing, and also comprising a plurality of spaced plates 35 separated by rubber rings 36. A rod 31 extends through all the rings, having a nut 38 at one end abutting an end follower plate 39, having a nut 40 at the opposite end abutting an end follower plate 4l. The end plate 39 is limited in its movement to one direction b-y a lug or flange 42 on the casing, while the end plate 4I is limited in its movement at the opposite end by a lug 43. The flange or lug 42 is provided with an opening 42a through which the nut 38 may pass, while the lug or plate 43 is provided with an opening 43a through which the nut 49 may pass. An operative connection is provided betweeenthe rods 20 and 3l by means of a lever 44 fulcrumed on a pin 45 mounted in a lug d6 on the casing I-I, the shorter arm ci the lever normally abutting the end of the rod 2] on the nut 32, the latter being conveniently in` the form of a cap nut. rIt will be seen that the nut 32 on the rod 2li engaging the lever 44, the lever will turn on its fulcrum moving the rod 3l the end of which, or the cap nut fit on it, engages the longer arm of the lever. As the movement of the rod 3l is controlled by the longer arm of the lever it will be seen that there will be substantially greater compression oi the element 33 than of the elements 2| and 22, thus providing increased resistance to bufng shocks.

In some cases it is found that the bufng shock will cause the head 4l of the coupler to engage the end of the casing, and I provide a resistance for this by mounting rubber springs it and it on opposite sides of a plate a, within a casing 5ta. connected to the ends of the housing, the springs 49 engaging a bufng plate 52 which prov jects through an opening in the casing Ela, and

is designed to engage the head 4l when it moves inwardly beyond a certain distance.

The alternative form shown in Figures 5, 6 and 7 differs from that shown in the other figures in that both shock resisting elements will afford v resistance to both pulling and bufiing. This is accomplished by forming a suitable connection between the rods Z and 37 which will cause them to operate together in both directions. A convenient way of doing this is by providing the connecting lever 44a with bifurcated ends li-lb and 44e which fit within grooves 32a and Mia on modied cap nuts 40h and 32h. This device Works as already described except that under pulling strain the cap nut 32h will engage and 'move the end of the lever Mia, thus moving the rod 3l and causing the springs in the lower part of the housing to also resist the pulling strain. l

It will be seen that by the foregoing construction a very light two wheel truck is provided, and it is intended that two of such trucks should be used to support a car body of convenient design, the'forward truck being connected to the rear truck by a connecting rod such as G, the forward end of which will have a corresponding swivelling connection with the forward truck. The mounting ofthe car axle housing and of the car wheel axle therein is the same as shown and claimed in my co-pending application Serial No. 2,272 filed January 17, 1935.

`Various modifications may be made in the invention without departing from the spirit thereof or the scope of the claims and, therefore, the exact forms shown are to be taken as illustrative only and not in a limiting sense, and I desire that only such limitations shall be placed thereon as are imposed by the prior art or are specifically set forth in the appended claims.

What I claim is:

1. In a car truck, a housing having two cylindrical sections mounted one above the other, with an opening at one end between the same, a

`reciprocably mounted coupling element in the upper section, resilient means in the lower section resisting such movement of the element, a lever mounted in the housing fulcrumed intermediate of its length, having one end connected to the coupling element and the opposite end connected to the resilient means.

2. In a car truck, a coupling element having a rod, resilient shock resisting means operatively .connected to the rod, a second rod, resilient shock resisting means operatively connected to the second rod and means pivotally connected intermediate its ends to said truck and operatively connecting the two rods in such a way as to combine the resistance of the shock resisting means to` absorb and resist both buiiing and pulling forces.

3. In a truck housing having two compartments, a shock absorbing elementin one compartment and a shock resisting element in the other, a pair of reciprocable connecting rods, one extending in one compartment through the shock absorbing element and operatively connected thereto and the other extending in the other compartment through the shock resisting element and operatively connected thereto, said rods projecting from the ends of said elements,

-a coupling element connected to the end of one rod and a lever connected to the opposite end of said rod, said lever being fulcrumed on the housing intermediate of its length and having one end connected to the rod engaging the shock resisting element whereby said shock absorbing element receives the preliminary shock, the resistance of said shock absorbing element being lever having the ends thereof associated with both of said rods for transmitting buing shocks from the coupler to the other resilient means.

5. In a car truck, a bolster substantially of T- shape in plan comprising a stem portion having two cylindrical sections positioned in adjacent relation with one another, resilient means positioned in both of said sections respectively, a reciprocating rod extending through and associated with each resilient means, a coupler pivotally connected to one of the rods and adapted to energize one of the resilient means, and a lever pivotally connected intermediate its ends to the stem portion, said lever extending through an aperture in said stem portion and having the ends thereof associated with both of said rods for transmitting buiilng and draft shocks from the coupler to the other resilient means.

6. In a car truck, in combination, a housing having two cylindrical sections positioned adjacent one another, a coupler stem, a coupler rod pivotally connected to theA coupler stem, said coucipfr'ocatting rod respectively, and an arm of the lever from the pivotal connection to the coupler fpler'stem and coupler rod' extending into one of *through an aperture therein, said lever havingy its' ends associated' with .the coupler rod andrerod being of aflength less than an arm of the lever from the said pivotal connectionkto the reciprocating rod.

JOSEPH ASHMORE i CAMERON. 

